I just made a huge monetary investment in this idea that I have. I realize that huge is relative, but based on my income level it could be all of the money that I'll ever have. I don't know if it's going to work out or not, but after a lot of contemplation I decided that even if I lose everything and nothing comes of it, it's still better than not having taken the chance and never known if my idea would have panned out.
My brother used to have this song of inconsequential title that started with a sound clip that said, "The funny thing about regret is, it's better to regret something you have done, than to regret something you haven't done." Don't look up the context or it'll ruin the quote, but I still think it's true.